Joseph Huang

Weechoon Teo

For this project, we will provide wireless network communication capabilities to an existing H.263 codec. Currently, bit error analysis is typically examined by inducing bit errors in a bitstream file. We propose to analyze bit error in an actual wireless system. To do this, we will require the use of the serial port of a PC to avoid the issues in packets being lost, losing a group of bits rather than just a few. By avoiding all the error correction and detection inherent in packet based networks, a modulating device off the serial port of 2 PCs will be used to examine errors on the bit level.

To start off, we will deliver a system for the midterm that transfers a H.263 coded bitstream across the serial port to another computer via a laplink serial cable. The encoder will read from a file and transmit the coded bitstream to the decoder where the output will be placed in another file. This will give us a working base to work off of for the final system.

After the midterm project, we will apply the serial port modulation and thread the codec with the serial port communicator to meet the H.263 standard’s requirements for minimum bit transfer rate. We will then analyze the effects of real bit errors to the H.263 bitstream in relation to the percentage of bit error and the recovery of the H.263 codec from errors. Once the Forward Error Correction advanced mode is available, we will incorporate it into our system.

Possible other work that can be done for this project are in the realm of error recovery and network adaptation. An update to this project proposal will be given after the midterm deliverables have been completed.